Iron pyrite, FeS2, reacts with O2 according to the following reaction: 4 FeS2(s) + 11 O2(g) ® 2 Fe2O3(s) + 8 SO2(g)
a) Calculate the mass of Fe2O3 that is produced from the reaction of 75.0 L of
O2(g) at 2.33 atm and 150.0oC with an excess of FeS2.

Ammonia and oxygen react to form nitrogen monoxide and water, like this: 4nh3 (g) + 5o2 (g) → 4no (g) + 6h2o (g) also, a chemist finds that at a certain temperature the equilibrium mixture of ammonia, oxygen, nitrogen monoxide, and water has the following composition: compound pressure at equilibrium nh3 65.1atm o2 31.3atm no 62.7atm h2o 65.8atm compound pressure at equilibrium nh3 65.3 atm o2 7.79 atm no 12.1 atm h2o 65.8 atm calculate the value of the equilibrium constant kp for this reaction. round your answer to 2 significant

If 22.5 liters of oxygen reacted with excess of hydrogen, how many liters of water vapor could be produced?

Find the mass, in grams, of 5.00*10^23 molecules of f2